I just picked up a 16570 also with the T<25 dial. Such a lovely watch, and reminds me of the 16570 Polar EXP II my father had that he would lend me for a few hours at a time to motivate me to work towards my goals.

I remember in the 90s walking into an ad in Bangkok asking to see the sports models, they led me to the display case with 30 white-faced Explorers the only watches in the case. nobody wanted them at that time.
I recently picked up one and loved it